SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.short_description, 
  IF(
    cscart_product_descriptions.short_description = '' 
    OR cscart_product_descriptions.short_description IS NULL, 
    cscart_product_descriptions.full_description, 
    ''
  ) AS full_description 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    93129, 93130, 93131, 93132, 93134, 93136, 
    93138, 93139, 93140, 93141, 93142, 
    93143, 93144, 93145, 93146, 93147, 
    93148, 93149, 93160, 93161, 93162, 
    93163, 93164, 93165, 93166, 93167, 
    93168, 93169, 93170, 93171, 93172, 
    93173, 93174, 93175, 93176, 93177, 
    93178, 93179, 93180, 93181, 93182, 
    93183, 93184, 93185, 93186, 93187, 
    93188, 93189
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00106

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "21.63"
    },
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "product_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "lang_code"
      ],
      "key_length": "9",
      "rows_examined_per_scan": 48,
      "rows_produced_per_join": 48,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "16.83",
        "eval_cost": "4.80",
        "prefix_cost": "21.63",
        "data_read_per_join": "183K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (93129,93130,93131,93132,93134,93136,93138,93139,93140,93141,93142,93143,93144,93145,93146,93147,93148,93149,93160,93161,93162,93163,93164,93165,93166,93167,93168,93169,93170,93171,93172,93173,93174,93175,93176,93177,93178,93179,93180,93181,93182,93183,93184,93185,93186,93187,93188,93189)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}